Date: 12/8/2020 8:27
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Benjamin Discovery Air Rifle

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Benjamin Discovery Air

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  • Built in America.
    Built in America. Made in the USA.
  • WARNING This product
    WARNING This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
This version of the Discovery does not include a pump, tank, yoke or fill adapter. To connect your Discovery to a scuba tank, you'll need a scuba tank adapter with hose and a female quick-disconnect with male threads. The tank must have a K valve.

To exhaust air or CO2 from the rifle, you need to purchase the degasser tool.

Get into precharged guns at an unheard-of price and also get the accuracy of an expensive European rifle!

Benjamin has bridged the gap and taken the pain out of PCP guns. Not only is this as low a price as you'll ever find on a PCP rifle, but it's so easy to pump up that a wispy teenager could do it!

The Discovery has raised the bar for PCP guns because it uses only 2000 psi of air. While the European companies race toward higher and higher air pressures, Benjamin is going the opposite direction and making it easier than ever to use a hand pump. If you want to use a scuba tank or carbon fiber tank, you can do that, too, and get the benefit of many more fills than you would from a gun that operates with 3000 psi. The Discovery gives you a choice! The air reservoir is 135cc. The air tank has a male Foster fitting.

The gun comes with a hardwood stock, Williams fiber optic front and rear sights, and a built-in air pressure gauge.

When you open your box, you'll see easy-to-follow and easy-to-understand instructions that'll lead you step-by-step. If you're an experienced PCP user, you'll soon see that the Discovery is the easiest PCP you've ever used. If you're new to PCPs, you'll become a pro in just a few short steps.

If you want to switch to CO2, that's easy to do, but you'll need a degasser tool to quickly exhaust all the air before filling with CO2. Attach the optional CO2 adapter, connect it to a standard paintball CO2 tank and fill 'er up! Now, commence to shootin'!

With high-pressure air, you'll get up to 25 powerful shots before you need to pump up again. On CO2, you'll get a lot more shots per fill.

Click on the AMMO link for a list of recommended pellets. The ACCESSORIES link has a list of fun targets and safety gear you'll need.
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other products by Crosman > Benjamin

Caliber.22" (5.5mm)
Max Velocity900 fps
Muzzle Energy25.7 ft/lbs
Barrel Length24.25"
Overall Length39.0"
Shot Capacity1
Front SightFiber Optic
Rear SightAdjustable for windage & elevation
Scopeable11mm dovetail
Suggested forSmall game hunting/plinking
Trigger Pull3.75 lbs
PowerplantPCP & CO2
Max Shots per Fill25
Body TypeRifle
Weight5.2 lbs
Cylinder Size135 cc
See manual
See schematics

other products by Crosman > Benjamin

Average Customer Review

4.5 (86 reviews)

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4.0 4.0

4.0 4.0

By Chris from USA on 2019-01-20
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Verified Purchase

Things I liked: Affordable pcp; larger sized than I anticipated but for the better; looks nice from the box

Things I would have changed: Bluing wore off where it contact the cardboard packaging.

What others should know: Purchased for youngster. Bigger and heavier than I thought but never saw one in person. I like it, but it seems a little big right now for my child. I also like that a hand pump can be used without hardship and replacement parts are available. Still haven't used it much but have a favorable initial impression so far.


5.0 5.0

5.0 5.0

5.0 5.0

By Brian from USA on 2018-08-25
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Things I liked: I have a .22 cal. Love it. Light wieght, small and easy to carry. It likes lots of pellets. Loves the gto's. I can get dime size groups at 35 yards.

Things I would have changed: Multi shot. Some more power.

What others should know: The sweet spot on mine @1700 psi for about 10 shots. I use gto, jsb 18 and crossman pellets.


5.0 5.0

5.0 5.0

5.0 5.0

By Woosy on 2018-08-15
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Things I liked: Consistently accurate (find the right pellet) Mine likes the JSP Exact 18.13 Grain best. Numerous aftermarket parts available. I put a moderator/silencer on and it is so quiet I can shoot in town. The gun is light weight.

Things I would have changed: I would (have) put a new butt plate on the stock to prevent slippage.

What others should know: I have the .22 version and have modified the trigger (metal), and the bolt probe (longer). This gun will consistently take down Collared doves out to 50 yards-very quietly. This gun is so consistent I haven't really considered upgrading. I am disabled so the pump mechanism for fills doesn't work- but a small scuba tank works well, and you can get them cheap/used. The gun operates in the 2000 PSI (Max) down to the 1000 PSI range which allows about 30 fills per tank. It will shoot about 18 shots per fill before needing to refill. Most PCP air guns operate at higher pressures-which increases the cost for equipment (filling). Put a quality scope on it and you will be surprised how far it will reach out- (seriously consider Mill dots as they help you learn ranges/drop/wind, etc.). I believe shooting this air gun for a few years has significantly improved my shooting at big game with powder rifles.


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  • Jesse from USA asked:

    Anyone know what kind of velocity this will produce with CO2?? I'm assuming quite a bit less than with air since CO2 doesn't compress to much over 800psi.

    • Tyler from USA:

      Yes, usually in the 600 fps range with 14 grain pellets

  • Jason from USA asked:

    What is the shot count on a 177 on one fill of co2

    • pcp4me from USA asked:

      I wonder what weight pellet they used for the 900 fps rating. With light lead pellets in the 12.56 gr weight they give only a 10 shot average of 836 fps for me! With a full air charge in the cylinder. I suspect they used some light alloy pellet, but I sure as hell wish they would tell what pellet and what weight was used. Else the information is USELESS!!! Just a manufacturer advertising gimmick to SUCK YOU IN!! I also wish the manufacturers would be FORCED to only use one weight of light pellet and one of medium weight and one of heavy weight for the caliber to rate their guns. Same pellets for ALL guns of same caliber!'s a thought. Maybe the manufacturers could/would come to such an agreement. Or at LEAST an agreement to publish the brand/weight of pellet used for their velocity claims!! Because these claims of 900 fps for this gun are not substantiated in MY gun with even light lead pellets!!

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      To fill your PCP gun:
      1.Pick a source of air shown at right
      2.If an adapter is needed, one will be shown
      3.Add both to your cart to get hooked up

      Benjamin Discovery Air Rifle with quick-disconnect connector (1M)

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      Airgun Academy Episode 38 - PCP Filling Systems

      Item Description

      Benj-BP9M22GSL [PY-1543-2840]
      .22 caliber Benjamin Dual Fuel PCP & CO2 rifle.
      Caliber.22" (5.5mm)
      Max Velocity900 fps
      Muzzle Energy25.7 ft/lbs

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